The Riemann hypothesis is the most important open question in number theory—if not all of mathematics. It has occupied experts for more than 160 years. And the problem appeared both in mathematician ...

Add Yahoo as a preferred source to see more of our stories on Google. Prime numbers are sometimes called math’s “atoms” because they can be divided by only themselves and 1. For two millennia, ...

How did you learn the mathematical formula for pi? It was likely the way I learned it. I was told to commit the value pi = 3.14 to memory along with the formula to calculate the area of a circle.